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首页> 外文期刊>Advanced Functional Materials >Efficient Optimization of Electron/Oxygen Pathway by Constructing Ceria/Hydroxide Interface for Highly Active Oxygen Evolution Reaction
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Efficient Optimization of Electron/Oxygen Pathway by Constructing Ceria/Hydroxide Interface for Highly Active Oxygen Evolution Reaction

机译：通过构建二氧化铈/氢氧化物界面实现高活性氧释放反应的电子/氧途径的有效优化

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摘要

Owing to the unique electronic properties, rare-earth modulations in noble-metal electrocatalysts emerge as a critical strategy for a broad range of renewable energy solutions such as water-splitting and metal-air batteries. Beyond the typical doping strategy that suffers from synthesis difficulties and concentration limitations, the innovative introduction of rare-earth is highly desired. Herein, a novel synthesis strategy is presented by introducing CeO2 support for the nickel-iron-chromium hydroxide (NFC) to boost the oxygen evolution reaction (OER) performance, which achieves an ultralow overpotential at 10 mA cm(-2) of 230.8 mV, the Tafel slope of 32.7 mV dec(-1), as well as the excellent durability in alkaline solution. Density functional theory calculations prove the established d-f electronic ladders, by the interaction between NFC and CeO2, evidently boosts the high-speed electron transfer. Meanwhile, the stable valence state in CeO2 preserves the high electronic reactivity for OER. This work demonstrates a promising approach in fabricating a nonprecious OER electrocatalyst with the facilitation of rare-earth oxides to reach both excellent activity and high stability.
机译：由于其独特的电子性能，贵金属电催化剂中的稀土调节已成为各种可再生能源解决方案（如水分解和金属空气电池）的关键策略。除了遭受合成困难和浓度限制的典型掺杂策略之外，还非常需要创新地引入稀土。本文通过引入CeO2载体为氢氧化镍铁铬（NFC）提出了一种新的合成策略，以提高氧气释放反应（OER）的性能，在10mA cm（-2）时实现230.8 mV的超低超电势，Tafel斜率为32.7 mV dec（-1），以及在碱性溶液中的出色耐久性。密度泛函理论计算证明了建立的d-f电子阶梯，通过NFC和CeO2之间的相互作用，明显促进了高速电子传递。同时，CeO2中稳定的价态保持了OER的高电子反应性。这项工作展示了一种制备稀土OER电催化剂的有前途的方法，该催化剂具有促进稀土氧化物达到优异活性和高稳定性的优点。

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  • 来源
    《Advanced Functional Materials》 |2020年第9期|1908367.1-1908367.9|共9页
  • 作者

    Xia Jiale; Zhao Hongyang; Huang Bolong; Xu Lingling; Luo Meng; Wang Jianwei; Luo Feng; Du Yaping; Yan Chun-Hua;

  • 作者单位

    Xi An Jiao Tong Univ Frontier Inst Sci & Technol Xian 710054 Shaanxi Peoples R China;

    Hong Kong Polytech Univ Dept Appl Biol & Chem Technol Hung Hom Kowloon Hong Kong 99907 Peoples R China;

    Inst Madrileno Estudios Avanzados Nanociencia IMD Ciudad Univ Cantoblanco E-28049 Madrid Spain;

    Nankai Univ Tianjin Key Lab Rare Earth Mat & Applicat Ctr Rare Earth & Inorgan Funct Mat Sch Mat Sci & Engn Tianjin 300350 Peoples R China|Nankai Univ Natl Inst Adv Mat Tianjin 300350 Peoples R China;

    Nankai Univ Tianjin Key Lab Rare Earth Mat & Applicat Ctr Rare Earth & Inorgan Funct Mat Sch Mat Sci & Engn Tianjin 300350 Peoples R China|Nankai Univ Natl Inst Adv Mat Tianjin 300350 Peoples R China|Peking Univ PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che State Key Lab Rare Earth Mat Chem & Applicat Beijing Natl Lab Mol Sci Coll Chem & Mol Engn Beijing 100871 Peoples R China|Lanzhou Univ Coll Chem & Chem Engn Lanzhou 730000 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    core-shell nanotubes; density functional theory; noble-metal-free electrocatalysts; oxygen evolution reaction; rare earth oxides;

    机译：核壳纳米管;密度泛函理论;无贵金属的电催化剂;氧释放反应稀土氧化物;

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